Hoisting device for converter ladle

Abstract

The invention relates to the technical field of hoisting, and particularly discloses a hoisting device for a converter ladle, the hoisting device comprises a lifting hook, a lifting rope for lifting the lifting hook and a lifting frame hinged to the ladle, an unhooking mechanism comprises a push rod rotationally mounted on the lifting hook, an elastic piece I, a transmission assembly and a clutch assembly, the lifting hook is connected with the lifting rope through the elastic piece I, and the lifting hook is connected with the lifting rope through the elastic piece II; after a ladle is placed on a bearing object, along with descending of the lifting rope, the transmission assembly drives the push rod to rotate forwards, after the push rod abuts against the lifting ring, the clutch assembly enables the push rod and the lifting hook to be locked, and when the lifting ring moves towards the opening of the lifting hook, the clutch assembly enables the push rod and the lifting hook to be disconnected gradually. After the push rod abuts against the lifting ring again, the clutch assembly locks the push rod and the lifting hook again, and meanwhile the push rod pushes the lifting ring out of the opening of the lifting hook; the lifting hook has the beneficial effect that the problem that the lifting hook and the lifting frame are not thoroughly separated can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and particularly relates to a hoisting device for a converter hot metal ladle. Background Art

[0002] During the production process of a converter, the hoisting of the hot metal ladle is a key link connecting the blast furnace and the converter, directly affecting production safety and efficiency. First, the hot metal flows from the blast furnace tapping hole into the hot metal ladle through the trough. During this process, the flow rate needs to be controlled to prevent splashing or overflowing, and it is necessary to ensure that the liquid level of the hot metal in the ladle does not exceed 85% of the volume. The hot metal ladle usually carries hundreds of tons of high-temperature hot metal and needs to be hoisted by a heavy crane through a special lifting tool. When hoisting, the principle of "low speed and stability" needs to be followed to avoid sudden stops and starts that cause the hot metal to shake. The path needs to avoid personnel and equipment, and the bottom of the ladle should maintain a safe height of more than 1.5 meters above the ground. During the hot metal pouring process, the pouring angle needs to be precisely controlled to prevent splashing. Any operating error may trigger major accidents such as ladle leakage and overturning.

[0003] Chinese patent document with the publication number CN219620685U discloses a hot metal ladle anti-disengagement hook and hoisting device, including a hot metal ladle, a connecting arm, a hanging frame, an anti-disengagement hook assembly, and a hoisting support. The hot metal ladle is a rectangular cavity structure with an open upper part, and the upper part of the hot metal ladle is movably connected to the hanging frame through the connecting arm. A hook is provided at the upper part of the hanging frame, and the hook is connected to the upper hoisting support through a hoisting rope. After the hot metal ladle is transported to the designated position, the operator first deflects the first hook to drive the hanging frame gradually towards the direction of the anti-disengagement hook assembly by moving the hoisting support and lifting the hoisting rope. When the hanging frame reaches the maximum deflection angle, as the first hook continues to move downward, the hanging frame gradually moves towards the opening direction of the hook until the first hook disengages from the hanging frame.

[0004] In the above technology, during the process of disengaging the hook from the hanging frame, it is necessary for the operator to manually control the lifting height of the first hook to achieve the disengagement of the hook from the hanging frame. And after the hook is disengaged from the hanging frame, the hanging frame needs to be deflected away from the direction of the hot metal ladle discharge nozzle. Moreover, when the hook opening is connected to the hanging frame, it is more convenient for the hook opening to move from the outside of the hanging frame towards the hanging frame. Therefore, if the hook is not completely disengaged from the hanging frame during the unhooking process, then as the first hook moves away from the hanging frame, the hook may pull the hanging frame, and then pull the hot metal ladle, resulting in the overturning of the hot metal ladle and causing a safety accident. Summary of the Invention

[0005] The present invention provides a hoisting device for a converter hot metal ladle, aiming to solve the technical problem that the hook is not completely disengaged from the hanging frame in the related technology.

[0006] A hoisting device for a converter hot metal ladle includes a hook, a hoisting rope for lifting and lowering the hook, and a hanging frame hinged to the hot metal ladle, and further includes: Decoupling mechanism, including a push rod rotatably mounted on the hook, an elastic member I disposed between the hook and the lifting rope, a transmission assembly with its input end connected to the lifting rope, and a clutch assembly for connecting the push rod and the hook. The hook is connected to the lifting rope through the elastic member I. The hinge point between the push rod and the hook is located on the right side of the hook opening, and the hook opening is within the rotation radius of the push rod. When the hook and the lifting rope approach each other, the transmission assembly drives the push rod to rotate forward. After the ladle is placed on the carrier, as the lifting rope descends, the transmission assembly drives the push rod to rotate forward. When the push rod abuts against the lifting ring, the clutch assembly locks the push rod and the hook. When the lifting ring moves towards the hook opening, the clutch assembly gradually disconnects the push rod from the hook, and the push rod continues to rotate forward. When the push rod abuts against the lifting ring again, the clutch assembly locks the push rod and the hook again, and at the same time, the push rod pushes the lifting ring out of the hook opening.

[0007] The effect is as follows: By setting the push rod and the clutch assembly, after the ladle is placed on the carrier, the weight of the ladle is borne by the carrier at this time. As the lifting rope descends vertically, since the compression spring is in a compressed state, the height of the hook remains unchanged. As the compression spring is released, after the push rod abuts against the lifting ring, the clutch assembly locks the push rod and the hook. Since the hanging bracket is in a vertical state at this time, it is avoided that the hook descends vertically too much, causing the push rod to directly push the hanging bracket out of the hook opening, thereby preventing the hanging bracket from deflecting to the front side of the ladle and affecting subsequent operations. When the push rod abuts against the lifting ring again, the clutch assembly locks the push rod and the hook again, and at the same time, the push rod pushes the lifting ring out of the hook opening. At this time, the push rod closes the opening of the hook, avoiding that the hook descends insufficiently, resulting in the lifting ring reconnecting with the hook when the worker controls the hook to move backward, causing the hook to pull the ladle and resulting in the ladle tipping over and causing a safety accident.

[0008] Preferably, the transmission assembly includes a rack mounted on the lifting rope, a one-way bearing disposed on the push rod, and a gear rotatably mounted on the outer ring of the one-way bearing and meshing with the rack. When the hook is not bearing weight, the rack is located below the gear. When the rack moves from above the gear to below the gear, the gear rotates and drives the push rod to rotate forward through the one-way bearing. An elastic member II for resetting the push rod is provided between the push rod and the hook.

[0009] Preferably, the elastic member I is a compression spring.

[0010] Preferably, an elastic member II is installed between the push rod and the hook. The elastic member II is a torsion spring I, and both ends of the torsion spring I are respectively connected to the push rod and the hook.

[0011] The effect is as follows: The torsion spring I is used to reset the push rod after the rack disengages from the gear.

[0012] Preferably, a sleeve is installed at the upper end of the hook, and a frustum is installed at the lower end of the lifting rope. The frustum is slidably installed in the sleeve in the vertical direction, and the upper and lower ends of the compression spring are respectively connected to the frustum and the upper end of the sleeve.

[0013] The effect is that by setting the sleeve, the frustum and the compression spring, when the hook bears weight, the distance between the lifting rope and the hook changes, so as to judge whether the hook bears weight by using the distance change.

[0014] Preferably, the clutch assembly includes a limit pin slidably installed on the push rod in the left-right direction and a driving member for driving the limit pin to move. An installation plate is fixedly installed on the hook. When the push rod rotates forward, when the push rod first abuts against the hanging ring, the driving member makes the limit pin protrude from the push rod, so as to abut against the lower end surface of the installation plate, locking the push rod and the installation plate. When the push rod abuts against the hanging ring again, the limit pin protrudes from the push rod again and abuts against the front end surface of the installation plate.

[0015] The effect is that by setting the installation plate and the limit pin, when the limit pin abuts against the lower end surface of the installation plate, the push rod first abuts against the hanging ring. When the limit pin abuts against the front end surface of the installation plate, the push rod closes the opening of the hook.

[0016] Preferably, the driving member includes a ejector rod slidably installed on the push rod, an elastic member three for resetting the ejector rod, and an elastic member four for resetting the limit pin. The sliding direction of the ejector rod intersects with the sliding direction of the push rod. An inclined surface is provided on the ejector rod. In the initial state, the limit pin abuts against the inclined surface, and the ejector rod extends beyond the front end surface of the push rod. When the push rod abuts against the hanging ring, the ejector rod is pressed into the push rod by the hanging ring.

[0017] Preferably, a connecting rod is fixedly installed on the ejector rod, and the connecting rod is hinged to the push rod. The elastic member three is a torsion spring two, and the two ends of the torsion spring two are respectively connected to the connecting rod and the push rod.

[0018] The effect is that by setting the connecting rod and the ejector rod, the push rod can rotate again only after the hanging ring is separated from the push rod by a certain distance. When the push rod is locked with the hook at the opening of the hook, the push rod can close the opening of the hook before the hanging ring completely disengages from the opening of the hook.

[0019] Preferably, the elastic member four is a tension spring. When the limit pin protrudes from the push rod, the tension spring applies a pulling force to the limit pin to pull the limit pin into the push rod.

[0020] Preferably, two sets of hook release mechanisms are provided, which are respectively located on the left and right sides of the hook.

[0021] Adopting the above technical solutions, the beneficial effects of the present invention are: By arranging a push rod on the hook and arranging a compression spring on the hook, the hook is connected to the suspension rope through the compression spring. After the hook bears weight, a distance change occurs between the hook and the suspension rope. The distance change between the hook and the suspension rope is used to drive the push rod to rotate, so as to push out the sling ring from the opening of the hook. And when the sling ring has not completely disengaged from the opening of the hook, the push rod and the hook are locked through the clutch assembly, so that the push rod can close the opening of the hook, preventing the hook from pulling the sling ring, and further preventing the ladle from tipping over. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of the sleeve of the present invention.

[0024] Figure 3 It is a schematic diagram of the state where the push rod and the sling ring of the present invention are in initial contact.

[0025] Figure 4 It is a schematic diagram of the state where the push rod and the sling ring of the present invention are in contact again.

[0026] Figure 5 It is a schematic diagram of the structure of the clutch assembly of the present invention.

[0027] Figure 6 It is a partial cross-sectional view of the push rod of the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the limit pin of the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the push rod of the present invention.

[0030] Reference Signs: 1, ladle; 2, hook; 21, sleeve; 22, mounting plate; 23, limit platform; 3, suspension rope; 31, frustum; 32, rack bar; 33, annular boss; 4, unhooking mechanism; 41, push rod; 411, rotating shaft; 412, chute one; 413, chute two; 42, elastic member one; 43, transmission assembly; 431, rack; 432, gear; 433, elastic member two; 44, clutch assembly; 441, limit pin; 442, ejector rod; 443, connecting rod; 444, inclined surface; 445, groove; 446, elastic member three; 447, elastic member four; 5, sling ring. Detailed Description of the Invention

[0031] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0032] AsFigure 1 As shown in the figure, a hoisting device for a converter ladle according to an embodiment of the present invention includes a hook 2, a lifting rope 3, a hanging frame, and two sets of hook - releasing mechanisms 4. The lower end of the lifting rope 3 is connected to the hook 2. The hanging frame is hinged to the ladle 1, and a lifting ring 5 for hanging in the hook 2 is installed on the hanging frame. The two sets of hook - releasing mechanisms 4 are symmetrically arranged on both sides of the hook 2 to ensure that the lifting ring 5 is evenly stressed and avoid the failure of unilateral hook - releasing. After the ladle 1 is placed on the bearing, as the lifting rope 3 descends, the hook - releasing mechanism 4 is used to push the lifting ring 5 out of the opening of the hook 2, and the hook - releasing mechanism 4 seals the opening of the hook 2 to prevent the lifting ring 5 from reconnecting with the hook 2.

[0033] As Figures 1-4 shown, the hook - releasing mechanism 4 includes a push rod 41, a first elastic member 42, a transmission assembly 43, and a clutch assembly 44. An upper - end - open sleeve 21 is fixedly installed at the upper end of the hook 2. A ring platform is installed at the upper - end opening of the sleeve 21, and a through - hole for the lifting rope 3 to pass through is formed in the middle of the ring platform. A conical platform 31 is fixedly installed at the lower end of the lifting rope 3. The conical platform 31 is slidably installed in the sleeve 21 in the up - and - down direction. The first elastic member 42 is arranged in the sleeve 21. The first elastic member 42 is a compression spring, and the upper and lower ends of the compression spring are respectively fixedly connected to the conical platform 31 and the ring platform. An upward - extending limit post is installed at the upper end of the conical platform 31. The limit post is used to abut against the ring platform after the compression spring is compressed to prevent the compression spring from bearing weight after being squeezed and causing the compression spring to deform and fail. Two mounting plates 22 extend downward from the lower - end surface of the sleeve 21. The two mounting plates 22 are respectively located on the left and right sides of the hook 2. The push rod 41 is between the mounting plate 22 and the hook 2. A mounting hole is formed in the mounting plate 22. The mounting hole is located on the right side of the opening of the hook 2. A rotating shaft 411 is fixedly installed at the end of the push rod 41 away from the hook 2. The rotating shaft 411 passes through the mounting hole. The opening of the hook 2 is within the rotation radius of the push rod 41. The input end of the transmission assembly 43 is connected to the lifting rope 3, and the output end of the transmission assembly 43 is connected to the rotating shaft 411. When the hook 2 and the lifting rope 3 approach each other, the transmission assembly 43 drives the push rod 41 to rotate forward, and the clutch assembly 44 is used to connect or disconnect the push rod 41 from the hook 2.

[0034] When the hook 2 hoists the ladle 1 from the bearing, since the hook 2 bears the weight of the ladle 1, the lifting rope 3 moves upward relative to the hook 2 first. The conical platform 31 moves upward in the sleeve 21 to compress and store energy in the compression spring. After the upper - end surface of the limit post abuts against the lower - end surface of the ring platform, the lifting rope 3 drives the sleeve 21 to move upward through the limit post, and then drives the hook 2 to move upward, thereby hoisting the ladle 1.

[0035] After the hook 2 places the ladle 1 on the carrier, as the lifting rope 3 continues to descend, the compression spring gradually releases. At this time, the hook 2 and the lifting rope 3 approach each other, and the transmission assembly 43 drives the push rod 41 to rotate forward. When the front end face of the push rod 41 abuts against the lifting ring 5, the clutch assembly 44 locks the push rod 41 and the mounting plate 22, and the compression spring stops releasing. At this time, the worker controls the lifting rope 3 to gradually move backward and downward, and the hook 2 drives the hanging bracket to deflect backward on the ladle 1 through the lifting ring 5. When the hanging bracket rotates to the maximum deflection angle on the ladle 1, the lifting ring 5 begins to gradually move toward the opening of the hook 2 inside the hook 2, and the clutch assembly 44 disconnects the push rod 41 from the hook 2 gradually. When the lifting ring 5 moves inside the hook 2 to be close to the opening of the hook 2, the clutch assembly 44 completely disconnects the push rod 41 from the hook 2. At this time, the compression spring continues to release, and the hook 2 and the lifting rope 3 continue to approach each other. The transmission assembly 43 drives the push rod 41 to rotate forward again. When the front end face of the push rod 41 abuts against the lifting ring 5 again, the clutch assembly 44 locks the push rod 41 and the mounting plate 22 again, and at the same time the push rod 41 also pushes the lifting ring 5 out of the opening of the lifting ring 5.

[0036] As Figures 2-5 , Figure 8 shown, the transmission assembly 43 includes a rack 431, a one-way bearing, a gear 432 and an elastic member two 433. An annular boss 33 is fixedly installed on the lifting rope 3, and a rack rod 32 extends downward from the lower end surface of the annular boss 33. The rack 431 is installed at the lower part of the rack rod 32. The inner ring of the one-way bearing is sleeved on the rotating shaft 411, and the inner ring of the one-way bearing is fixedly connected to the rotating shaft 411. The gear 432 is sleeved on the outer ring of the one-way bearing, and the gear 432 is fixedly connected to the outer ring of the one-way bearing. The elastic member two 433 is arranged between the push rod 41 and the mounting plate 22. The elastic member two 433 is a torsion spring one, and both ends of the torsion spring one are fixedly connected to the push rod 41 and the mounting plate 22 respectively. When the hook 2 does not bear weight, the compression spring is in its original length state. At this time, the rack 431 is located below the gear 432.

[0037] When the hook 2 bears weight, the compression spring is first compressed, and the hook 2 and the suspension rope 3 move away from each other. At this time, the suspension rope 3 drives the rack bar 32 to drive the rack 431 to move upward relative to the gear 432. When the rack 431 meshes with the gear 432, as the rack 431 moves upward relative to the gear 432, the rack 431 drives the gear 432 to rotate in the reverse direction. When the gear 432 rotates in the reverse direction, it drives the outer ring of the one-way bearing to rotate idly relative to the inner ring. When the hook 2 and the suspension rope 3 approach each other, the rack 431 moves downward relative to the gear 432. As the rack 431 moves downward relative to the gear 432, the rack 431 drives the gear 432 to rotate forward. When the gear 432 rotates forward, it drives the inner ring to rotate forward through the outer ring of the one-way bearing, and then drives the push rod 41 to rotate forward through the rotating shaft 411. When the push rod 41 rotates forward, the first torsion spring gradually stores energy. When the push rod 41 completely disengages from the hook 2, the compression spring returns to its original length. When the rack 431 moves to the lower side of the gear 432 and the rack 431 disengages from the gear 432, the first torsion spring is released at this time, driving the push rod 41 to rotate in the reverse direction and reset.

[0038] As Figures 2-8 shown, the clutch assembly 44 includes a limit pin 441 and a driving member. A first chute 412 is formed at one end of the push rod 41 away from the hook 2. The limit pin 441 is slidably installed in the first chute 412 in the left-right direction. In the initial state, the limit pin 441 is retracted into the first chute 412, and a limit platform 23 is provided on the front end face of the mounting plate 22.

[0039] When the push rod 41 rotates forward, when the front end face of the push rod 41 first abuts against the suspension ring 5, the driving member drives the limit pin 441 to extend out of the push rod 41, and the limit pin 441 abuts against the lower end face of the mounting plate 22. At this time, the limit pin 441 is blocked by the lower end face of the mounting plate 22, so that the push rod 41 cannot rotate forward, thereby realizing the locking between the push rod 41 and the mounting plate 22. When the suspension ring 5 starts to move gradually towards the opening of the hook 2 in the hook 2, the driving member drives the limit pin 441 to gradually contract into the push rod 41. When the suspension ring 5 moves to near the opening of the hook 2 in the hook 2, at this time the driving member drives the limit pin 441 to completely contract into the push rod 41, thereby releasing the locking state between the push rod 41 and the mounting plate 22.

[0040] Then, as the compression spring continues to be released, the push rod 41 continues to rotate forward. When the push rod 41 abuts against the suspension ring 5 again, the driving member drives the limit pin 441 to extend out of the push rod 41 again. When the push rod 41 rotates forward and pushes the suspension ring 5 out of the opening of the hook 2, the limit pin 441 abuts against the limit platform 23 and the front end face of the mounting plate 22. At this time, the limit pin 441 is blocked by the limit platform 23 and the front end face of the mounting plate 22, so that the push rod 41 cannot rotate forward, thereby realizing the locking between the push rod 41 and the mounting plate 22.

[0041] When the suspension rope 3 drives the hook 2 to move backward, after the lifting ring 5 is completely disengaged from the hook 2 and the push rod 41, the driving member drives the limiting platform 23 to contract into the push rod 41. When the limiting pin 441 is disengaged from the front end faces of the limiting platform 23 and the mounting plate 22, the compression spring continues to release, causing the rack 431 to move downward to the lower side of the gear 432 and disengage from the gear 432. During this process, the push rod 41 first rotates forward under the drive of the gear 432, and then the rack 431 disengages from the gear 432, and the release of the first torsion spring drives the push rod 41 to rotate backward and reset.

[0042] As Figures 2-8 shown, the driving member includes a push rod 442, a third elastic member 446, a fourth elastic member 447 and a connecting rod 443. One end of the connecting rod 443 is hinged to the end of the front end face of the push rod 41 away from the rotating shaft 411. The push rod 442 is fixedly installed on the connecting rod 443, and the push rod 442 is integrally arc-shaped. A slope 444 is provided at the lower end of the push rod 442. An arc-shaped chute two 413 that penetrates both the front and rear end faces is provided on the push rod 41, and the chute two 413 communicates with the chute one 412. The push rod 442 is slidably installed in the chute two 413. A groove 445 is provided on the limiting pin 441. The third elastic member 446 is arranged at the hinge joint between the connecting rod 443 and the push rod 41. The third elastic member 446 is a second torsion spring, and both ends of the second torsion spring are fixedly connected to the connecting rod 443 and the push rod 41 respectively. The fourth elastic member 447 is arranged in the chute one 412. The fourth elastic member 447 is a tension spring, and both ends of the tension spring are fixedly connected to the push rod 41 and the limiting pin 441 respectively.

[0043] In the initial state, the connection between the push rod 442 and the connecting rod 443 is far from the front end face of the push rod 41. At this time, most of the connecting rod 443 extends beyond the front end face of the push rod 41. At the same time, the slope 444 on the push rod 442 abuts against the upper edge of the groove 445 on the limiting pin 441. Before the push rod 41 abuts against the lifting ring 5, the connecting rod 443 first abuts against the lifting ring 5. As the push rod 41 continues to rotate forward, the connecting rod 443 is squeezed by the lifting ring 5 and drives the push rod 442 to move toward the rear end face direction of the push rod 41. At this time, the slope 444 pushes the limiting pin 441 to extend out of the push rod 41. When the lifting ring 5 moves toward the opening of the hook 2 in the hook 2, the lifting ring 5 is disengaged from the push rod 41, and the connecting rod 443 gradually resets under the drive of the second torsion spring. When the lifting ring 5 moves to near the opening of the hook 2 in the hook 2, the connecting rod 443 is reset. At this time, the limiting pin 441 contracts into the push rod 41 under the pull of the tension spring.

[0044] The specific working principle of the embodiment of the present invention: When lifting the ladle 1 from the carrier, since the hook 2 bears the weight of the ladle 1, when the lifting rope 3 moves upward, the compression spring is first stressed and compressed. After the limit post abuts against the ring platform, the lifting rope 3 drives the sleeve 21 to move upward through the limit post, and then drives the hook 2 to move upward, so as to lift the ladle 1.

[0045] After the hook 2 places the ladle 1 on the carrier, as the suspension rope 3 continues to descend, the compression spring gradually releases. At this time, the hook 2 and the suspension rope 3 approach each other. The suspension rope 3 drives the rack 431 to move downward relative to the gear 432 through the annular boss 33. As the rack 431 moves downward, the rack 431 drives the gear 432 to rotate forward. When the gear 432 rotates forward, the outer ring of the one-way bearing drives the inner ring to rotate forward, and then drives the push rod 41 to rotate forward through the rotating shaft 411. When the push rod 41 rotates forward, the first torsion spring gradually stores energy. At the same time, when the connecting rod 443 abuts against the hanging ring 5, as the push rod 41 continues to rotate forward, the connecting rod 443 is squeezed by the hanging ring 5 and drives the ejector rod 442 to move toward the rear end face of the push rod 41. At this time, the inclined surface 444 pushes the limit pin 441 to protrude from the push rod 41, and the limit pin 441 abuts against the lower end face of the mounting plate 22. At this time, the limit pin 441 is blocked by the lower end face of the mounting plate 22, so that the push rod 41 cannot rotate forward, and then the lock between the push rod 41 and the mounting plate 22 is realized. At this time, the worker controls the suspension rope 3 to gradually move backward and downward, and the hook 2 drives the suspension frame to deflect backward on the ladle 1 through the hanging ring 5. When the suspension frame rotates to the maximum deflection angle on the ladle 1, as the suspension rope 3 continues to move backward and downward, the hanging ring 5 begins to gradually move toward the opening of the hook 2 in the hook 2, and the hanging ring 5 is separated from the push rod 41. The connecting rod 443 gradually resets under the drive of the second torsion spring. When the hanging ring 5 moves to near the opening of the hook 2 in the hook 2, the connecting rod 443 is reset. At this time, the limit pin 441 contracts into the push rod 41 under the pull of the tension spring. Then the compression spring continues to release, and the push rod 41 continues to rotate forward. When the connecting rod 443 abuts against the hanging ring 5 again, as the push rod 41 continues to rotate forward, the connecting rod 443 is squeezed by the hanging ring 5 and drives the ejector rod 442 to move toward the rear end face of the push rod 41 again. At this time, the inclined surface 444 pushes the limit pin 441 to protrude from the push rod 41 again. When the push rod 41 abuts against the hanging ring 5, the push rod 41 continues to rotate forward and pushes the hanging ring 5 out of the opening of the hook 2. At the same time, the limit pin 441 abuts against the front end faces of the limit platform 23 and the mounting plate 22. At this time, the limit pin 441 is blocked by the front end faces of the limit platform 23 and the mounting plate 22, so that the push rod 41 cannot rotate forward, and then the lock between the push rod 41 and the mounting plate 22 is realized again, and the opening of the hook 2 is closed by the push rod 41 to prevent the hanging ring 5 from entering the hook 2 again. Then the suspension rope 3 continues to drive the hook 2 to move backward. When the hanging ring 5 is completely separated from the hook 2 and the push rod 41, the connecting rod 443 is reset again under the drive of the second torsion spring. At the same time, the limit pin 441 contracts into the push rod 41 again under the pull of the tension spring. When the limit pin 441 is separated from the front end faces of the limit platform 23 and the mounting plate 22, the compression spring is completely released, so that the rack 431 moves downward to the lower side of the gear 432 and is disengaged from the gear 432. During this process, the push rod 41 first rotates forward driven by the gear 432, and then the rack 431 is disengaged from the gear 432, and the first torsion spring releases to drive the push rod 41 to reverse and reset.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A hoisting device for a converter hot metal ladle, comprising a hook, a lifting rope for lifting the hook, and a hanger articulated on the hot metal ladle, characterized in that, It further includes: A decoupling mechanism, which includes a push rod rotatably installed on the hook, a first elastic member arranged between the hook and the lifting rope, a transmission assembly with its input end connected to the lifting rope, and a clutch assembly for connecting the push rod and the hook. The hook is connected to the lifting rope through the first elastic member. The hinge point between the push rod and the hook is located on the right side of the hook opening, and the hook opening is within the rotation radius range of the push rod. When the hook and the lifting rope approach each other, the transmission assembly drives the push rod to rotate forward. After the ladle is placed on the bearing object, as the lifting rope descends, the transmission assembly drives the push rod to rotate forward. When the push rod abuts against the sling ring, the clutch assembly locks the push rod to the hook. When the sling ring moves towards the hook opening, the clutch assembly gradually disconnects the push rod from the hook, and the push rod continues to rotate forward. When the push rod abuts against the sling ring again, the clutch assembly locks the push rod to the hook again, and at the same time, the push rod pushes the sling ring out of the hook opening.

2. The hoisting device for a converter hot metal ladle according to claim 1, characterized in that, The transmission assembly includes a rack installed on the lifting rope, a one-way bearing arranged on the push rod, and a gear rotatably installed on the outer ring of the one-way bearing and meshing with the rack. When the hook is not bearing weight, the rack is located below the gear. When the rack moves from above the gear to below the gear, the rotation of the gear drives the push rod to rotate forward through the one-way bearing. An elastic member two for resetting the push rod is arranged between the push rod and the hook.

3. The lifting device for a converter hot metal ladle according to claim 1, characterized in that, The first elastic member is a compression spring.

4. The lifting device for the converter hot metal ladle according to claim 2, wherein, An elastic member two is installed between the push rod and the hook. The elastic member two is a first torsion spring, and both ends of the first torsion spring are respectively connected to the push rod and the hook.

5. A lifting device for a converter hot metal ladle according to claim 3, characterized in that, A sleeve is installed at the upper end of the hook, and a frustum is installed at the lower end of the lifting rope. The frustum is slidably installed in the sleeve in the vertical direction. The upper and lower ends of the compression spring are respectively connected to the frustum and the upper end of the sleeve.

6. The lifting device for the converter hot metal ladle according to claim 1, wherein The clutch assembly includes a limit pin slidably installed on the push rod in the left-right direction and a driving member for driving the limit pin to move. An installation plate is fixedly installed on the hook. When the push rod rotates forward and initially abuts against the sling ring, the driving member makes the limit pin extend out of the push rod, so as to abut against the lower end surface of the installation plate and lock the push rod to the installation plate. When the push rod abuts against the sling ring again, the limit pin extends out of the push rod again and abuts against the front end surface of the installation plate.

7. A hoisting device for a converter hot metal ladle according to claim 6, characterized in that, The driving member includes a push rod slidably installed on the push rod, a third elastic member for resetting the push rod, and a fourth elastic member for resetting the limit pin. The sliding direction of the push rod intersects with the sliding direction of the push rod. An inclined surface is arranged on the push rod. In the initial state, the limit pin abuts against the inclined surface, and the push rod extends beyond the front end surface of the push rod. When the push rod abuts against the sling ring, the push rod is pressed into the push rod by the sling ring.

8. A hoisting device for a converter hot metal ladle according to claim 7, characterized in that, A connecting rod is fixedly installed on the push rod, and the connecting rod is hinged to the push rod. The third elastic member is a second torsion spring, and both ends of the second torsion spring are respectively connected to the connecting rod and the push rod.

9. The hoisting device for a converter hot metal ladle according to claim 7, characterized in that, The fourth elastic member is a tension spring. When the limit pin extends out of the push rod, the tension spring applies a pulling force to the limit pin to pull the limit pin into the push rod.

10. A hoisting device for a converter hot metal ladle according to claim 1, characterized in that, Two sets of the decoupling mechanisms are provided, respectively located on the left and right sides of the hook.

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